diff --git a/appendix/custom-kb-css.rst b/appendix/custom-kb-css.rst
new file mode 100644
index 00000000..10630fc3
--- /dev/null
+++ b/appendix/custom-kb-css.rst
@@ -0,0 +1,15 @@
+Custom CSS for Public Knowledge Base
+====================================
+
+You can apply visual changes to your public knowledge base via custom CSS.
+To do so, follow these steps:
+
+#. Add your CSS file(s) inside the directory
+   ``app/assets/stylesheets/custom_knowledge_base_public`` of your Zammad
+   installation. You can use one or more files and choose any name,
+   as long as they have a .css extension.
+#. Precompile the assets by using the command ``rake assets:precompile``
+   (depends on your installation method, see :doc:`/admin/console`).
+#. Restart Zammad.
+#. Access your published knowledge base. Please note: the visual changes only
+   affect the published version and not the edit screen.
diff --git a/index.rst b/index.rst
index df112cfa..6a648228 100644
--- a/index.rst
+++ b/index.rst
@@ -103,3 +103,4 @@ Zammad System Documentation
    /appendix/reporting-tools-thirdparty
    /appendix/redis
    /appendix/custom-kb-url
+   /appendix/custom-kb-css